(19)
(11) EP 0 739 730 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.03.1998 Bulletin 1998/11

(43) Date of publication A2:
30.10.1996 Bulletin 1996/44

(21) Application number: 96104807.1

(22) Date of filing: 26.03.1996
(51) International Patent Classification (IPC)6: B41F 31/02, B41F 5/24
(84) Designated Contracting States:
CH DE FR GB IT LI

(30) Priority: 27.04.1995 JP 104078/95

(71) Applicant: MITSUBISHI JUKOGYO KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Baba, Yasuyuki, c/o Mihara Machinery Works
    Mihara-shi, Hiroshima-ken (JP)
  • Okamoto, Arifumi, c/o Mihara Machinery Works
    Mihara-shi, Hiroshima-ken (JP)
  • Niuchi, Kunio, c/o Mihara Machinery Works
    Mihara-shi, Hiroshima-ken (JP)

(74) Representative: Henkel, Feiler, Hänzel & Partner 
Möhlstrasse 37
81675 München
81675 München (DE)

   


(54) Flexographic printer


(57) Object: To make a printing in which an ununiformity of inking process (ununiform dispersion of ink density) on a printing portion can be dissolved, a cleaning time of inking rolls etc. can be shortened and an operation rate of a printer (productivity) can be enhanced.
Construction: A flexographic printer in which ink 5 supplied into a nip portion of inking rolls consisting of a rubber roll 1 and an anilox roll 2 is transferred via the anilox roll 2 onto a printing die 6 fitted around the outer circumferential face of a printing cylinder 3 and is further transferred onto the surface of a sheet 4 running between the printing cylinder 3 and an impression roll 7, thereby a printing is made. Numeral 8 designates an inking roll cover, into which a clean air is taken through a filter 10. Then, through a fan 11 and an air vent 12, the air is blown into the inking roll cover 8 and forms a slightly higher static pressure within the inking roll cover 8 than that of the peripheral area. The air is ejected to the outside of the inking roll cover 8 from a gap between the inking roll cover 8 and the printing cylinder 3, and by a dynamic pressure caused thereby, paper dusts, paper scraps or other scattering dusts etc. are prevented from coming in the inking roll cover 8, thereby their sticking on the outer circumferential face of the rubber roll 1 or the anilox roll 2, or their mixing with the ink 5 supplied into the nip portion of the rubber roll 1 and the anilox roll 2 can be prevented.






Search report